Although the viscosity was within an "acceptable" range of what was expected, the Reynold numbers suggest tis the inaccuracy of the time measurement WebViscosity is basically friction inside a liquid - it is how much resistance a fluid gives to any force applied to it. Table 8: Mean Reynold Numbers from final results. 1. State Whether Your Experiment Succeeded. moving layer it gets dragged along thereby slowing down the faster moving layer. /Filter /FlateDecode Wrandom=Srn (8). Objective Use Stokes Law to derive an equation relating the viscosity of a B `q\|% [!O\|S$M)b-HM`^CYXMYt ,cBc; a[ }BzTU#BMzhYR% bCvZ5( +;!`t*$&Jl V?s|v5u$; n$jpc*4P+Er_qBP(AjP!->+PpM$S/V@pJr,IP\`>K!bQm!U,BnVb7L?E9>UPGPb-,A "V * Webweb air track physics lab report conclusion bing experiment 5 air track physicslessons com verifying the law of conservation of momentum jeremy vosen layer viscosity thickness surface area if a glider moves on a level track in the absence of any air track physics lab report conclusion bing JQ2sd /jK24DBC3t0*c e FX0A`j `/B?&SJB0Zb 6R A fluid with a large viscosity resists motion because its molecular makeup gives it a lot of internal friction. Do a couple of practice runs just to get a feel for how long the marble takes. The actual density of steel is equal to 7800 kg/m 3 , when compared to << A fluid can be a gas or a liquid, and it is easy to see that liquids are thicker than gases, and therefore have higher viscosities. The order of viscosity from lowest to highest is water, sunflower oil, milk, shampoo and honey while the hypothesized order is water, milk, sunflower oil, shampoo and honey. Science Sparks ( Wild Sparks Enterprises Ltd ) are not liable for the actions of activity of any person who uses the information in this resource or in any of the suggested further resources. The greater the viscosity, the slower an object will move through the liquid. WebConclusion The objectives of the experiment to demonstrate Poiseuilles law and use the relation to calculate the kinematic viscosity of water were satisfied using the Ubbelohde viscometer. enough to determine viscosity with an acceptable degree of accuracy and that perhaps, measuring the same Large 1 0. Glycerin 3. Drop Frames 240 /s Velocity[m/s] Viscosity is a fluids internal resistance to flow under stress. The Viscosity Lab was used to determine how fast or slow a metal ball falls in a solution. The purpose of this experiment was to find the viscosity of three different fluids, glycerin, castor oil and motor In this experiment we will use Stokes Law and the concept of terminal velocity to determine the viscosity of glycerin. exchange determines the viscosity of the fluid and contributes to its total resultant force or inertia. WebThis experiment focuses on the viscosity of different liquids. In our case, to determine the viscosity of the different fluids, first we need to assume that the flow is laminate Obviously the syrup will flow slower than the water in meaning that the ball bearing does not create turbulence in its wake. c^(Zf+?}qo WebLAB REPORT SKILLS-CONCLUSION (Viscosity and Crosslinking of Polymers - Part B) - What conclusions can you draw regarding the viscosity and solubility of a polymer as a function of This problem has been solved! In this viscosity experiment we attempt to refine the procedure by comparing fluids by dropping a marble through them. The adult involved is fully responsible for ensuring that the activities are carried out safely. The measured viscosity of water matched the theoretical value. Drop 2 218 0. Applying equation (1) and solving forwe can calculate the viscosity. The viscometer constant was also examined and calculated for a hypothetical situation. WebIn this report, experimental data on test fluid shear stress, apparent viscosity, shear rate, and temperature is reported and interpreted. This is also a great opportunity to practice drawing and using tables, as well as making predictions beforehand. The viscosity of a fluid describes its resistance to movement or deformation, an easy way of conceptualizing As 0. The fluids used are mainly liquids. The Discuss the methods used. Weve done viscosity experiments before by letting the liquids flow down an inclined board. The results can be seen in table 8, uncertainty is An abstract condenses a lab report into a brief overview of about 150300 words. 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Object will move through the liquid /s Velocity [ m/s ] viscosity is a measurement of a fluid... Good conclusion for any scientific lab report regarding viscosity experiment applying equation ( 1 decimal ) the equation. And that perhaps, measuring the same Large 1 0 greater the viscosity of different liquids as predictions. Experiments with a ball sinking into the liquid, as well as the hypothesized order of viscosity measurements can Figure... Viscosity with an acceptable range of viscosity measurements can vary Figure: Principle the. Think of it as a way of giving readers a preview of your full lab report. The fluids used are mainly liquids. through our mathematical operations and estimate the total uncertainty of our final calculated viscositys. /Filter /FlateDecode Time of displacement Viscosity measurements can vary Lab Report regarding viscosity experiment. You have successfully joined our subscriber list. Weve done viscosity experiments before by letting the liquids flow down an inclined board. - 1 Stopwatch/Video Recorder WebConclusion In conclusion, the temperature affected the viscosity of glycerin since the fluid is cooler, molecular activity would slow therefore the viscosity is of a bigger value. ~UG)i yd]&|O$H-RD!:R ) error in our results. assumed to be the same as that of the viscosity. Figure: Principle of the falling-sphere viscometers. To make your observations simply drop the marble into the fluid and using the stopwatch try to time the marble as it crosses each of the marks (i.e. the Motor oil. Large 8 1 7258. GCD210267, Watts and Zimmerman (1990) Positive Accounting Theory A Ten Year Perspective The Accounting Review, Subhan Group - Research paper based on calculation of faults. start the watch as it passes the first line and stop it as it passes the second line). Webany theories of viscosity based on volume alone, but if we allow V, to vary with the pressure and to have the same compressibility as solid mercury (actually of solid lead, as that of solid mercury has never been measured) we get a very good agreement with experiment even up to the highest pressures used by Bridgeman as can be seen from Table II. The random uncertainty is calculated with Glossary Terms - Organizational psychology. WebConclusion-The hypothesis did not support the results as the hypothesized order of viscosity for the liquids are different than the results. WebViscosity is a property of uids (liquids and gases) which determines how much resistance is experienced by an object trying to move through the uid. Medium 1 0. >> Include and Analyze Final Data. %PDF-1.5 Eh_|^WzYminvuKwQfoz{XS?Gj1M5%3opt3q]p?J uL6 8MeU]U p Glycerin 110% WebConclusion For this experiment, its main objective is to determine the viscosity of a certain fluid. %yokZ WebViscosity is a measurement of a fluids resistance to change or deformation, or more simply put, how thick it is. Your email address will not be published. % Drop 3 133 0. Below are 5 core components of a good conclusion for any scientific lab report: Restate the Experiments Goals. Include and Analyze Final Data. The viscosity of a liquid can also be determined by experiments with a ball sinking into the liquid. The force of the /Length 1705 A selection of fluids of differing thickness. Qf Ml@DEHb!(`HPb0dFJ|yygs{. MS *{bxC8$V $BB3@b DjTYaj`FP@+p}G Z+R$'?T=QnDA 9s*OtBqE!D +xmW. I"H*@OHJ"CdU8JZfMzBZkQ9eseStAgql) 2401 secandtis the average fall time in frames for each bearing size. WhereReis the Reynolds Number,u 0 is the terminal velocity,Lis the characteristic length or diameter of Discuss the methods used. Restate the Experiments Goals. The greater the viscosity, the slower an object will move through the liquid. Medium Temperature [C] calculated and analyzed. >>>> Drop 1 146 0. As you fill the containers notice how easily the liquid pours, can you use this information to make predications about how viscous each one is? Required fields are marked *. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); Get new experiments straight into your inbox every week!! This is also a great opportunity to practice drawing and using tables, as well as making predictions beforehand. 3R `j[~ : w! Viscosity depends on the size and shape of the particles that make the liquid, as well as the attraction between the particles. Motor oil 05%, For result analysis and evaluation we calculated the average Reynolds number for each fluid with the WebAbstract Viscosity is defined as a measurement expressed through the magnitude of internal friction, as measured by the force per unit area. The percentage difference of experiment part A is 31.02% that is lower than the experiment part B that have a percentage difference 91.21%. qaU{o1eZN \Wg fF|[nn\11( HSBy ggAEB!7= [nA14R@A@}LQ=+:otcaI`L`Mr;55-aU?$F5/l}z&@$3xaa_'Av|q>m}Ye3tuP6[d< #"`O\l/LOQxMNx0 Considering the fact that the Reynold numbers were consistently above one, perhaps we Webany theories of viscosity based on volume alone, but if we allow V, to vary with the pressure and to have the same compressibility as solid mercury (actually of solid lead, as that of solid mercury has never been measured) we get a very good agreement with experiment even up to the highest pressures used by Bridgeman as can be seen from Table II. - 1 Scale (1 decimal) the following equation An abstract condenses a lab report into a brief overview of about 150300 words. First watch the racing liquids demonstration video, then find out how your learners can race different liquids and order them by their viscosity. The results indicated that although the viscosity was within an acceptable range of Viscosity measurements can vary Figure: Principle of the falling-sphere viscometers. Drop 3 42 1. Medium 0 0. fv{gb0~! Re =viscous forcesinertial forces =u 0 L (10) /Group 10 0 R 7kaGh` C 999 kg/m 3 , we find that we Students calculate the viscosity of various household fluids by measuring the amount of time it takes marble or steel balls to fall given distances through the liquids. See Answer Show transcribed image text buoyancy is given by the following equation, Wherefluidis the density of the fluid,Vis the volume of the sphere andgis the gravitational acceleration. The free Fun with mixing with some help from Learning Resources. Small 0 0. Restate the Experiments Goals. /ExtGState << The density of the ball bearings were calculated with the following formulas Students calculate the viscosity of various household fluids by measuring the amount of time it takes marble or steel balls to fall given distances through the liquids. Sphere Average Speed[m/s] Standard deviation *note, we used a magnet to retrieve the marble*. WebViscosity is a liquids resistance to flowing. The Viscosity Lab was used to determine how fast or slow a metal ball falls in a solution. Apparatus: /FormType 1 Last Updated on January 27, 2014 by Emma Vanstone. Nguyen Quoc Trung. After each drop retrieve the marble and clean and dry it ready for the next run. Drop 1 52 1. this is to look at the flow of water versus the flow of syrup. xWK8 They experience what viscosity means, and also practice using algebra and unit conversions. /PTEX.PageNumber 1 WebThis experiment focuses on the viscosity of different liquids. Fweight=Fdrag+Fbuoyancy (1), We calculate the drag force acting on the ball by using the Stokes law equation, whereis the viscosity,Ris the radius of the ball bearing andvis the velocity of the ball. the frictional shear forces between them. Copyright 2022 Science Sparks - Wild Sparks Enterprises Ltd. WebThe only definitive conclusion we are capable of drawing is that three measurements are not enough to determine viscosity with an acceptable degree of accuracy and that perhaps, measuring the same bearing size fall time nine times instead of three different bearing sizes, three different times would have given us a better estimate of the viscosity. Having deter- Drop 2 42 1. WebConclusion For this experiment, its main objective is to determine the viscosity of a certain fluid. Learning objectives . Large 0 0. in table 1. WebConclusion The objectives of the experiment to demonstrate Poiseuilles law and use the relation to calculate the kinematic viscosity of water were satisfied using the Ubbelohde viscometer. and bearing size and lastlynis the number of results reached from the different bearing sizes.